KR20030005937A - A tapping socket of tapping machine for blast furnace - Google Patents

Abstract

PURPOSE: A tapping socket of tapping machine for blast furnace is provided to improve maintenance productivity and reduce work load by easily assembling and disassembling a tapping bar when performing one shot opening of tap hole, thereby preventing damage of the tapping machine due to counterflow of melt. CONSTITUTION: In a tapping socket for connecting a tapping bar from a tapping machine performing tap hole opening, the tapping socket of the tapping machine for a blast furnace comprises protrusions(5) which are formed on both sides of the rear end of the tapping bar(138); a cylindrical body(10) in which a tapping bar locking insertion hole(7) is formed so that the rear end of the tapping bar(138) and the protrusions(5) are inserted into the tapping bar locking insertion hole(7); a protrusion catching part(12) which is formed on the middle part of the body(10) so that the protrusions(5) are circumferentially rotated to be inserted into the protrusion catching part(12); a screw rod locking member(20) which is formed at the rear side of the body(10), and to which a screw rod is spirally coupled; and a cooling gas cylinder inlet(16) which is formed between the tapping bar locking insertion hole(7) and the screw rod locking member(20), and diameter of which is reduced.

Description

Tapping socket of furnace opening machine {A TAPPING SOCKET OF TAPPING MACHINE FOR BLAST FURNACE}

The present invention relates to a tapping socket (Socket) for connecting the tapping bar in the tapping machine for performing the opening work in the furnace, and more specifically, tapping bar by a simple structure at the time of opening of the outlet for starting the furnace ( Bar), and the tapping socket of the furnace opening machine that can easily separate the tapping bar after opening the opening.

In general, in the blast furnace operation, as shown in FIG. 1, the tap opening 110 formed on the lower wall of the blast furnace 100 is opened using a tapping machine 120 to melt the internal melt (melt + solvent) ( 130) to be discharged to the outside.

This outlet opening work is made 10 to 12 times a day by the opening machine 130.

The opener 130 is equipped with an air hammer (not shown) and an air drill (not shown) in the body 132, a screw rod 134 is mounted to the front side of the body 132, the screw A tapping socket 136 is positioned at the front side of the rod 134 to connect the tapping bar 138.

To this end, the tapping socket 136 connects and mounts the tapping bar 138 by using the cotter pin 140, the spring 142, and the tapping bar groove 144, and thus, the body through the tapping socket 136. The tapping bar 138 connected to the 132 is configured such that the bit 146 mounted at the front end thereof enters the exit port 110 and performs opening work.

As such, the tapping bar 138 forms a groove 144 having a predetermined depth in the coupling portion for coupling with the tapping socket 136, and for this purpose, the thickness (outer diameter-inner diameter) of the tapping bar 138 is a groove. It must be larger than the depth of (144), so thick pipe is used, so the unit price is high.

In addition, through holes 134a and 138a are formed in the screw rod 134 and the tapping bar 138 to cool the bit 146 mounted at the tip of the tapping bar 138. Nitrogen or air), and the pressure of the cooling gas is approximately 8 to 10 kg / cm 2, which is relatively higher than the pressure of 4 kg / cm 2 inside the furnace 100.

However, the opening of the furnace 100 using the conventional apparatus as described above has the following problems. That is, when performing the opening operation of the tap opening 110 using a conventional opening factory, the tapping bar 138 is used once and then discarded, and after opening the tap opening 110, the opening machine ( When the tapping bar 138 mounted on the 120 is drawn out, since the supply of the cooling gas is stopped, the tapping bar 138 and the screw are instantaneously discharged due to the flow of the melt (melting + molten metal) inside the furnace 100. A problem occurs that flows into the through holes 134a and 138a of the rod 134 and causes the loss of the opening machine 120.

Therefore, when penetration of the outlet 110 is completed during the opening of the opening work, the tapping bar 138 should be easily separated from the tapping socket 136, but the groove 144 of the tapping bar 138 is an air hammer during the opening work. The impact from the (not shown) and the air drill (not shown) is crushed by the cotter pin 140, the phenomenon does not occur.

In addition, when performing a single opening operation of about 30 to 40 times, the cotter pin 140 assembled in the conventional tapping socket 136 is also crushed due to wear or the spring 142 and the clamp 150 are deteriorated and elastic force is applied. This also causes a problem that the tapping socket 136 and the tapping bar 138 are not easily coupled or separated after a single opening operation.

Accordingly, the conventional tapping socket 136 is frequently broken due to the combination of the cotter pin 140 and the clamp 150 having a complicated structure, and the thickness of the tapping bar 138 for the formation of the tapping bar groove 144. There are problems such as cost increase in reconciliation and increase of workload for combining and separating.

The present invention has been made in order to solve the conventional problems as described above, its purpose is to prevent the breakage of the opening by the reverse flow of the melt by easily combining and separating the tapping bar when performing the opening of the opening port The present invention provides a tapping socket for a blast furnace opening machine, which can greatly improve maintenance work productivity and work load reduction, and enable the use of a tapping bar that can be produced at low cost, thereby reducing work costs.

1 is a configuration diagram showing the opening of a general furnace;

2 is an exploded perspective view showing a tapping socket of an opening machine according to the prior art;

3 is a cross-sectional view of a tapped socket according to the prior art;

4 is an external perspective view showing a tapping socket according to the present invention;

5 is a cross-sectional view showing in detail a cut part of the tapping socket according to the present invention; FIG. 6 is a cross-sectional view for explaining the operating state of the tapping socket according to the present invention.

<Description of the symbols for the main parts of the drawings>

5 ..... Turning 7 ..... Tapping Bar Tightening Insert

10 .... Body 10a ... Head

12 .... protrusion stop 16 .... cooling gas inlet

20 .... Screw Rod Fasteners 100 ... Furnaces

110 ... exit 120 ... open air

130 ... melt 134 ... screw rod

138 ... Tapping Bar 140 ... Cotter Pin

150 ... clamp

In order to achieve the above object, the present invention, in the tapping socket (Socket) for connecting the tapping bar in the tapping machine for performing the opening work, forming a protrusion on both sides at the rear end of the tapping bar, the tapping The rear end of the bar and the projection has a cylindrical body formed with a tapping bar fastening insertion hole therein, the middle portion of the body is formed in each of the projection is rotated in the circumferential direction is inserted into the projection engaging portion, On the rear side, a screw rod fastener is formed in which screw rods are screwed together, and a tapping socket of a blast furnace opening machine is formed between the tapping bar fastening insertion hole and the screw rod fastening hole with a reduced diameter gas inlet. By providing.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

As shown in FIG. 4, the tapping socket 1 of the furnace opening machine according to the present invention is to retrofit the rear end of the tapping bar 138 differently from the prior art. That is, although the groove 144 is formed at the rear end of the tapping bar 138 in the related art, in the present invention, the projections 5 having the left-right symmetry type are formed differently from the above.

The protrusion 5 is formed as if it is an ear shape, which is attached by welding so as to be symmetrical on the outer periphery of the circular tapping bar 138 so as to be fitted to the tapping bar fastening insertion hole 7 which will be described later. have.

The mounting position of the protrusion 5 is formed adjacent to the rear end of the tapping bar 138, and the attachment distance d with the rear end of the tapping bar 138 is cooled by the protrusion part 12 of the body 10. It is formed to have a length equal to the distance d where the gas inlet 16 begins to penetrate.

The shape of the tapping bar protrusion 5 should be smaller than the diameter of the tapping bar 138 in a cylindrical shape, the minimum diameter size is 10mm or more, the length is formed slightly smaller than the projection engaging portion 12, the material is carbon Manufactured from low grade steel species.

Meanwhile, as shown in FIG. 5, the tapping socket 1 according to the present invention is provided with a tapping bar fastening insertion hole 7 into which the tapping bar 138 is fitted, and a screw rod on the other side thereof. A screw rod fastener 20 is formed to which the 134 is screwed together, and a cooling gas inlet 16 having a reduced diameter is formed between the tapping bar fastening insertion hole 7 and the screw rod fastener 20. .

The tapping bar fastening insertion hole 7 has a shape corresponding to the fastening portion of the tapping bar 138, that is, the outline of which the tapping bar 138 and the tapping bar protrusion 5 are integrally formed. The depth is formed in the same shape up to the front end of the cooling gas inlet 16.

In addition, the body 10 between the front side head portion 10a having the tapping bar fastening insertion hole 7 and the rear side 10b having the screw rod fastening portion 20 has a smaller diameter than the head portion 10a. The tapping bar fastening insertion hole 7 is drilled to the outside so that the state of being coupled with the passing of the tapping bar protrusion 5 at a predetermined distance on both sides of the outer periphery of the body 10 is successively opened, and the body 10 is subsequently connected. ) The protrusion engaging portion 12 is formed in the middle portion of the shape bent in the L-shape.

One side "a" shaped groove length of the protrusion rim portion 12 is formed slightly larger than the longitudinal direction of the tapping bar protrusion 5, the depth of the groove is processed to twice the size of the diameter of the tapping bar protrusion (5), The other side "a" groove is also processed in this way, the projection engaging portion 12 is formed in a direction that is further coupled according to the drilling direction of the opening machine.

Referring to the operation and effects of the present invention configured as described above are as follows.

The tapping socket 1 of the blast furnace opening machine according to the present invention is a fastening insertion hole 7 of the tapping socket 1 of the present invention when the worker taps the tapping bar 138 with the screw rod 134 of the opening machine. Push in and insert until the rear end of tapping bar 138 reaches the front end of cooling gas inlet 16.

In this state, when the screw rod 134 is rotated in the opposite direction to the opening direction, the protrusions 5 are caught and fastened at the protrusion catching portions 12 of the grooves having a "-" shape.

Subsequently, even when the tap hole 110 is excavated by rotating the opening machine screw rod 134 in a direction opposite to the insertion direction of the fastened tapping bar 138, the fastening state is determined by the rotation direction of the opening machine screw rod 134. Because it is made in the opposite direction becomes more robust, the projection 5 of the tapping bar 138 is not isolated or separated from the projection engaging portion 12 until the screw rod 134 is artificially reversed during the excavation operation.

On the other hand, in the engaged state of the tapping bar 138, since the rear end of the tapping bar 138 is exactly in contact with the front end of the cooling gas inlet 16, a gap between the tapping bar 138 and the gas inlet 16 There is no cooling gas and nitrogen and cooling water are smoothly supplied.

The mixed gas flows to the hole 138a of the tapping bar 138 through the cooling gas inlet 16 at a pressure of 8 to 10kg / cm 2, and is mounted at the tip of the tapping bar 138 during the starting operation. This is to prevent overheating of the bit 146.

In addition, when the screw rod 134 of the opening machine 120 is slightly reversed at the time when the opening work of the outlet 110 is completed, the protrusions 5 of the tapping bar 138 are formed of the protrusion catching part 12. When the opening is retracted from the groove in this state, the tapping bar 138 and the tapping socket 10 are directly separated to prevent the hot melt from flowing back into the opening, thereby not damaging the opening.

As such, the operation of reversing the opening can be accomplished by the operator remotely through a remote controller (not shown), so that the operation of separating the tapping bar 138 from the tapping socket 1 can be made more convenient.

According to the present invention as described above, when the penetration of the exit port 110 in the conventional opening is completed, the tapping bar 138 should be easily separated from the tapping socket 1, but the cotter pin 140 and the clamp ( 150, the groove 144 portion of the tapping bar 138 is crushed to the cotter pin 140 due to excessive impact and wear caused by the use of an air hammer (not shown) and an air drill (not shown) during a single opening operation As the spring 142 and the clamp 150 lose elasticity due to deterioration, it becomes difficult to separate them, thereby eliminating the problem that the melt flows back into the air hole and causes fatal damage.

In addition, although a cost increase is caused by an increase in the thickness of the tapping bar 138 in order to form the conventional tapping bar groove 144, the protrusion 5 on the tapping bar 138 is only required according to the present invention. Since only the electrodes need to be fixed by welding, the manufacturing of the tapping bar 138 becomes very simple.

Therefore, a low-cost tapping bar 138 can be manufactured, which greatly reduces the work cost.

As described above, the effect of the present invention is that when the opening port 110 is opened using the tapping socket 1 for opening and closing the tapping bar 138 and the structure is easy to be separated and separated, the remote (remote control) is separated. Because of the easy structure, it is possible to prevent the backflow of the melt at the completion of opening to prevent fatal damage of the opening.

In addition, the work load for the worker to separate the tapping bar 138 heated to a high temperature can be significantly improved, and bit cooling efficiency at the tip of the tapping bar 138 as the loss of cooling medium is greatly reduced by modifying the fastening structure. By greatly improving the first opening of the outlet 110 greatly increased.

In particular, a cost increase occurs because the thickness of the tapping bar 138 for forming the tapping bar groove 144 is inevitably increased, but according to the present invention, there is no need to adjust the thickness of the tapping bar 138 upward, thereby greatly reducing the cost. The practical effect to achieve is obtained.

Claims (5)

In the tapping socket (Socket) for connecting the tapping bar in the tapping machine for performing the opening work, the rear end of the tapping bar 138 is formed with projections 5 on both sides, the rear end of the tapping bar 138 And a cylindrical body 10 having a tapping bar fastening insertion hole 7 formed therein so that the protrusion 5 is inserted therein, and the protrusion 5 is rotated in the circumferential direction and inserted in the middle portion of the body 10. Possible projection engaging portions 12 are formed respectively, while a screw rod fastener 20 for screwing the screw rod 134 is formed on the rear side of the body 10 and the tapping bar fastening insert 7 And between the screw rod fastener 20, the tapping socket of the furnace opening machine, characterized in that the cooling gas inlet 16 is reduced in diameter is formed. According to claim 1, wherein the mounting position of the projection (5) is formed adjacent to the rear end of the tapping bar 138, the attachment distance (d) with the rear end of the tapping bar 138 is the projection of the body 10 The tapping socket of the furnace opening machine, characterized in that the portion (12) is formed in the same length as the distance (d) of the place where the cooling gas inlet (16) passes through. According to claim 1, wherein the length of the "a" groove of one side of the projection portion rim 12 is formed slightly larger than the longitudinal direction of the tapping bar projections 5, the direction is further tightened according to the drilling direction of the opening machine Tapping socket of the furnace opening machine, characterized in that the groove is formed. The method of claim 1, wherein the tapping bar fastening insertion hole 7 is formed as a hole slightly larger than the shape corresponding to the outline where the tapping bar 138 and the tapping bar protrusion 5 are integrally formed, and the depth thereof is a cooling gas inlet. A tapping socket of a furnace opening machine, characterized in that it is formed in the same shape up to the front end of (16). According to claim 1, wherein the body 10 between the front side head portion (10a) formed with the tapping bar fastening insertion hole 7 and the rear side (10b) formed with the screw rod fastening portion (20) is the head portion (10a) It is smaller in diameter, and the tapping bar fastening insertion hole 7 is formed to be drilled to the outside so that the state in which the taping bar protrusion 5 is coupled to the outer peripheral side of the body 10 at a predetermined distance can be seen. Tapping socket of the furnace opening machine.